Announcements
Attention for Customers without Multi-Factor Authentication or Single Sign-On - OTP Verification rolls out April 2025. Read all about it here.

Is there a "Multipass" feature for Multi-Axis turning?

jeruedas
Enthusiast

Is there a "Multipass" feature for Multi-Axis turning?

jeruedas
Enthusiast
Enthusiast

I am turning a piece in my multi-axis machine (Legacy Maverick 3x5). I know this CNC is unique in the way it handles lathe turning. The piece I am making is an organic twisted shaft like handle with multiple groves on it. I have already make on prototype and it looks ok, but I hope to improve the manufacturing process. Currently I am adding multiple Multi-Axis/Rotary/Line pases to the piece in order to to some clearing of the excess material. I do this because I need to start with a thick stock. I am not sure if is possible to do multipasses in one operation with this tool?. Does anybody have experience with this tool in wood? 

I am including here the model I am making. I am a bit new so I am not sure what to include.

Thanks for your help.

0 Likes
Reply
Accepted solutions (1)
989 Views
10 Replies
Replies (10)

Ketherton21
Collaborator
Collaborator

yes please add the f3d file.

 

at the top of fusion go to the second icon from the left, and go to export. and then attach it to your original post or a reply.

 

your question was kind of confusing and im not sure what exactly you are doing or trying to do.

0 Likes

jeruedas
Enthusiast
Enthusiast

Sorry my question was a mess. Let me try it again.

I am currently machining a part using multi-axis/rotary/line tool. because of the shape of the part, there is a lot of air turning. I was looking for a feature like the multiple depths settings in the 2D Adaptive Clearing. I already use a solid stock in the setup that is closer to the final shape.

0 Likes

johnswetz1982
Advisor
Advisor

You have a little bit of bad terminology. Its not really turning, that would be the Rotary toolpath. There is no multipass. What you can do is use something like 3D adaptive and rough down to your centerline, the index your setup 90 or 180 or however many degrees and repeat the 3D adaptive operation. Then just use the rotaray toolpath for your finish pass or passes.  

0 Likes

jeruedas
Enthusiast
Enthusiast

Thanks for your reply. I have a CNC that has a lathe part for turning that I have been using for the past 3 years. I started using the rotary tool-path about a year ago with some success. Sorry for my "Bad" terminology, but I am trying to improve the manufacturing of a part and I am a bit new to some Fusion tool-paths.

I think that I understood your idea and started testing it, but I do not see any way to enter a rotation angle in any of the 3D tool-paths. I do not want to do it manually in the CNC. I am missing something that is so obvious? Did you see the jpg of what I want to do?

0 Likes

johnswetz1982
Advisor
Advisor

It is more of an indexer than a lathe unless you can spin it at high RPMs and use turning tools in your milling spindle. Maybe you can but I doubt it on a machine like that.

 

To use tool orientation you create an initial setup. This would be with Z up. You would create a [3D Adaptive] operation with no tool orientation. You would then create a 2nd operation with tool orientation checked and with Z being 180 degrees from you original setup (you may have to flip your other axis as well). When you post this out Fusion sees the difference between the initial setup and the tool orientation. This tells fusion to rotate the part 180 degrees (or 90 or whatever you set in tool orientation). 

0 Likes

jeruedas
Enthusiast
Enthusiast

Thanks for your explanation. I will test it tomorrow.

BTW, the machine I have is a Maverick 3x5 from Legacy woodworking machinery, made here in the USA. It has turning capabilities in a way of a stepping motor setup, capable to rotate at lower speeds while the spindle travels in the X, Y and Z axis. It uses Mach3 in a version created by LWM. It is designed mostly for woodworking. I am a sound sculptor and use a CNC to save my hands, mostly.

0 Likes

jeruedas
Enthusiast
Enthusiast

I made a new model using loft to fix issues with my first model. I did a setup the way you suggested and added two operations just for testing (only two tool orientations for now). Somehow, I can see the texture in the surface similar to the one I get using the rotary tool path as before. Not sure if I am doing something wrong in the settings of the operations. Appreciate your help.

 

0 Likes

Anonymous
Not applicable
Accepted solution

Modifying stock alone doesn't restrict tool path to its shape, when you select top of the stock at its highest point and set bottom height at model bottom or origin, tool path is generated covering everything in between those two levels and outlined stock, regardless of stock shape.

 

To restrict tool path to desired area, make sketch outlining it and use it as stock boundary along with tool on center and additional offset to cover desired area.

Make second sketch to be used as stock outline and adjust height tab to top of stock in that section of model.

 

You can also duplicate body and split it in sections then use parts in different setups to minimize air cutting in roughing. 

I would do 3 radial segments, 120 degree apart and adjust bottom height so that tool path overlaps previous one, then finish using rotary.

 

Also note that using "rest machining" in initial roughing operation doesn't do anything, rest machining is used to foolow up after another tool or operation to remove stock that toot was unable to reach.

 

0 Likes

Anonymous
Not applicable

There is still ail cutting going on but it minimizes it mostly to first tool path. To further eliminate air cutting you would have to manage more individual segments in same manor, not really worth the trouble unless you are making production run of more than few parts and cycle time makes or breaks the deal.

0 Likes

jeruedas
Enthusiast
Enthusiast

Thanks for the response and the advice. I understood your points and consider the other process I used, Rotary/Line and think that the time spend is about the same. Since I am cutting wood (that has fibers and uneven hardness), I think the straight line cuts are more effective minimizing vibration, wood tear and machine wear. I am not mass producing this parts, just 3 or 4 for sculptures I am making. As suggested by you, I am using a boundary confinement strategy in rotary (in my case) to help reduce the time that the cutter cuts air. It makes a big difference in the over all time. I have another post on an issue that I am getting some sore of texture in my models, that I do not want. I see the texture in all other strategies I have use, Adaptive Clearing, Parallel and scallop. I am not sure where that comes from. It maybe from the way I build the model? I used 7 or 8 sketches and lofted them to make the solid.

Thanks for your help.  

0 Likes